Spring各种类型变量set依赖注入的方法

一、依赖注入的两种方式：构造器注入和set注入。今天我们来说的就是set注入方式。

首先推荐Spring的中文文档链接：https://www.docs4dev.com/docs/zh/spring-framework/5.1.3.RELEASE/reference

下面所记录的文档中都有详细的介绍，但是个人感觉文档缺点就是记录的太过于杂乱。

 

package com.ly.pojo;

import java.util.*;

public class Student {
//字符串类型
    private String  name;
//Bean类型
    private Address address;
//数组类型
    private String[] book;
//列表类型
    private List<String> hobbies;
//Map类型
    private Map<String,String> card;
//Set类型
    private Set<String> games;
//空类型
    private String wife;
//properties类型
    private Properties iinfo;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public String[] getBook() {
        return book;
    }

    public void setBook(String[] book) {
        this.book = book;
    }

    public List<String> getHobbies() {
        return hobbies;
    }

    public void setHobbies(List<String> hobbies) {
        this.hobbies = hobbies;
    }

    public Map<String, String> getCard() {
        return card;
    }

    public void setCard(Map<String, String> card) {
        this.card = card;
    }

    public Set<String> getGames() {
        return games;
    }

    public void setGames(Set<String> games) {
        this.games = games;
    }

    public String getWife() {
        return wife;
    }

    public void setWife(String wife) {
        this.wife = wife;
    }

    public Properties getIinfo() {
        return iinfo;
    }

    public void setIinfo(Properties iinfo) {
        this.iinfo = iinfo;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", address=" + address.toString() +
                ", book=" + Arrays.toString(book) +
                ", hobbies=" + hobbies +
                ", card=" + card +
                ", games=" + games +
                ", wife='" + wife + '\'' +
                ", iinfo=" + iinfo +
                '}';
    }
}

 

下面是配置文件：这里需要注意的是要区分将map和peoperties对比了解。

map中的key和value是通过<entry key="身份证" value="123456789"/>

而peoperties是<prop key="学号">20183763</prop>，value的值是写在中间的。

下面的代码中我将其两个写在了一块，便于对比。

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
  <!--  <bean id="user" class="com.ly.pojo.User">
       <constructor-arg name="name" value="凌云"></constructor-arg>
    </bean>-->
    <bean id="address" class="com.ly.pojo.Address">
        <property name="address" value="甘肃省庆阳市南大街"/>
    </bean>
    <bean id="student" class="com.ly.pojo.Student">
        <!--普通注入-->
        <property name="name" value="凌云"/>
        <!--Bean注入-->
        <property name="address" ref="address"/>
        <!--数组注入-->
        <property name="book">
            <array>
                <value>红楼梦</value>
                <value>西游记</value>
                <value>水浒传</value>
                <value>三国演义</value>
            </array>
        </property>
        <property name="hobbies" >
            <list>
                <value>听歌曲</value>
                <value>敲代码</value>
                <value>看电影</value>
            </list>
        </property>
         <property name="card">
             <map>
                 <entry key="身份证" value="123456789"/>
                 <entry key="银行卡" value="5555555555"/>
             </map>
         </property>
        <property name="iinfo">
            <props>
                <prop key="学号">20183763</prop>
                <prop key="性别">男</prop>
                <prop key="姓名">凌云</prop>
            </props>
        </property>
        <property name="games">
            <set>
                <value>LOL</value>
                <value>COC</value>
                <value>BOB</value>
            </set>
        </property>
        <property name="wife" >
            <null/>
        </property>


     </bean>


</beans>